package net.zjitc.hashset.ktv;

/**
 * @Author admin
 * @Date 2019/4/3 9:00
 *    工具类接口
 */
public interface SongDao {
    void init();
    void add(Song song);
    void all();
    void top(String name);
    Song select(String name);
    void before(Song music);
}
